Fix postgresql integer columns
Merge pull request #52 from locomote/postgres-integers

Fix postgresql integer columns
Fixes #51 (not sure why it was like this before..)
Changes previous fix to behave like before

This way, if arg is Array it will never go into conditions, even if the
Array is empty
Adds test for Instance.getAssociation(conditions, cb)
2.0.3
Adds LIKE operator
clearer English use in documentation
change singleton to caching and integrity
change singleton to caching and integrity
Merge pull request #54 from nicholasf/master

clearer English for README.md, change 'Singleton' to 'Caching and Integrity'